Pipe-die.



H. J. HUNT.

I PIPE DIE. APPLIOATIOK FILED MAR.20, 1911.

1,011,798. Patented Dec.12,1911.

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WITNESSES 9 INVENTOR MWVQ Cum/mum FMNOGRAPH 110-. WASHINGTON. D. c.

H. J. HUNT.

PIPE DIE.

. APPLICATION FILED MAIL 20, 1911.

Patented Dec. 12,1911.

2 BHEETB-BHBET 2.

INVENTOR HENRY J T .J 5& 2 w MW COLUMBIA PLANOGRAPII CO" WASHINGTON. [L C.

HENRY J. HUNT, OF DAVENPORT, IOWA.

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Specification of Letters Patent.

Patented p eiz, 1911.

Application filed March 20, 1911. Serial No. 615,628.

To all whom it may concern:

Be it known that I, HENRY J. HUNT, a citizen of the United States, residing at Davenport, in the county of Scott and State of Iowa, have invented certain new and useful Improvements in Pipe-Dies, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to thread cutting dies and the principal object of the same is to provide novel lubricating means therefor which can be controlled by the operator so that lubricating material can be delivered to the work when necessary or desirable.

Preferred and practical embodiments of the invention are shown in the accompanying drawings, wherein Figure 1 is a vertical longitudinal sectional view of the improved die. Fig. 2 is a bottom plan view. Fig. 3 is a top plan view, partly broken away. Fig. 4 is an enlarged fragmentary vertical sectional view showing the oil reservoir and pump. Fig. 5 is a similar view, the pump being shown in elevation. Fig. 6 is a view similar to Fig. 1 showing a modified form of the invention. Fig. 7 is a fragmentary longitudinal sec-- tional view of one of thehandles used in connection with the modified form of th'e invention.

Referring to the accompanying drawings by numerals and particularly to the form of the invention illustrated in Figs. 1, 2, 3, and 4, it will be seen that the improved die comprises the stock 8 having the usual supporting plate 9 pivoted thereto and which forms a seat for the die 10. Internally the upper portion of the stock 8 is internally threaded for the reception of the externally threaded holding sleeve 11 for the work 12. The stock 8 has the usual end sockets 13 into which the handles 14 are fitted. The upper portion of the stock 8 is in the form of an externally beveled shell 15 which forms an oil reservoir having a threaded filling opening 16 at one portion that is normally sealed by the flanged and threaded plug 17. A similar opening 18 is formed through the outer wall of reservoir 15 and is normally sealed by the flanged and threaded cap 19 of a pump cylinder 20. The pump cylinder projects across the reservoir 15 and has a reduced nozzle 21, the end of which is externally threaded for engaging a threaded opening 22 in the inner wall of the said reservoir. Said nozzle projects beyond the inner wall and. is engaged by a cap 23 having a discharge opening 24 arranged to dis? charge lubricating material into the work 12 adjacent the teeth of the die 10. The nozzle 21 has an internal valve seat 25 adj acent its junction with cylinder 20 for a check valve 26 the stem 27 of which is slidable through a guiding spider 28. A spring 29 coiled about stem 27 normally holds valve 26 to its seat 25. The pump cylinder 20 has an air inlet port 30 adjacent its upper end and adjacent its lower end is provided with a threaded opening 31 into which an inlet tube 32 is threaded. Tube 32 has its outer end equipped with a perforated cap 33 for straining the lubricating material passing therethrough. The inner end of tube 32 has a dischar e opening 34 adapted to be sealed bya vafire 35,, the stem 36 of which passes through a guide 37 in said tube. A spring 38 coiled about said stem normally retains the valve open. A piston 39 is slidable in cylinder 20 and its operating rod 40 projects through cap 19, and is equipped with a head 41 that is preferably concaved so that the rod 40 be readily reciprocated by the fingers of the operator. A spring 42 is coiled about rod 40 for normally projecting said rod to the limit of its outward movement. A partition 43 extends across the reservoir to prevent the lubricating material flowing around said reservoir, and a shorter partition 44 extends partly across the reservoir. The partitions 43 and 44 are disposed in opposite sides of the outlet end of the intake tube of the pump cylinder 20 and form a pocket for retaining lubricating material adjacent said tube.

As is clearly shown in Figs. 1 and 6 the piston rod 40 projects toward one of the handles 14 so that the operator can readily reciprocate the said rod by his fingers while grasping the said handle.

In use it will be seen that on the upstroke of the piston 39, the intake valve 35 is opened and lubricating material sucked into the cylinder 20. On the downstroke of the piston, valve 35 is closed and valve 26 is opened so that the lubricating material is forced through the nozzle 21 and onto the work and die.

In the modified form of the invention shown in Figs. 6 and 7 the stock 8 has a lubricant reservoir 45 at one side that is in direct communication with one of the handle sockets 46. The handle 47 for said socket is hollow and serves as a source of lubricant supply for the reservoir 45. The outer end of the handle 47 is sealed by a plug 48. In all other respects this form of the invention is the same as that shown in Figs. 1, 2, 3, 4L, and 5.

lVhat I claim as my invention is:

1. A lubricator for cutting dies comprising a stock provided with a lubricant reser voir, a pump cylinder having its head and discharge end engaging the walls of said reservoir, said cylinder being provided with an intake, partitions in said reservoir arranged to provide a lubricant pocket at said intake, and a manually operable piston in said cylinder.

2. A lubricator for cutting dies comprising a stock provided with a lubricant reservoir, the outer wall and inner wall being provided with alined openings, a pump cylinder having its head and discharge end engaging said alined openings, said dis charge end engaging the opening of the inner wall, an inlet pipe adjacent said discharge end and a manually operable piston in said cylinder.

3. A lubricator for cutting dies, comprising a stock provided with a lubricant reservoir, oppositely disposed laterally projecting handles for said stock, a pump cylinder in said reservoir having its head mounted in the outer wall thereof and its discharge nozzle projecting through the inner wall, a piston in said pump, and a rod for said piston having its free end adjacent one of said handles.

4:- A lubricator for cutting dies comprising a stock provided with a lubricant reservoir, the outer wall of said reservoir being provided with a filling opening, a plug for said opening, the outer wall and the inner wall being provided with alined openings, a pump cylinder having its head and discharge end engaging said alined openings, said cylinder being provided with an intake, partitions in said reservoir arranged to pro vide a lubricant pocket at said intake, and a manually operable piston in said cylinder.

5. A lubricator for cutting dies comprising a stock, handles for said stock, the upper portion of said stock being hollow to provide a lubricant reservoir, a pump cylinder in said reservoir having a discharge nozzle arranged to deliver lubricating material, an outwardly opening valve in said nozzle, an inlet tube projecting laterally from said cylinder, a strainer carried by said tube, an inwardly opening valve in said tube, a piston in said cylinder, and a rod therefor having its free end projecting beyond the head of said cylinder and adjacent one of said handles.

In testimony whereof I hereunto afiiX my signature in presence of two witnesses.

HENRY J. HUNT.

Witnesses:

HENRY H. JEBENs, L. H. TRENT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, 11.0. 

